Please allow multiple dimensions

[Rahien]

Can you please add the ability to use csv's with more than two interdependent dimensions? Currently, when you try that, recurring values in the dimensions are not reused but duplicated.

E.g. if I have the following simple csv:
color/location,Belgium,Germany,Belgium,Germany
color/time,2011,2011,2012,2012
red,42,31,20,9
blue,9,20,31,42

The location dimension will have twice the value for Germany and twice that of Belgium. The same goes for the time dimension.